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Abstract

Protocol

Representative Results

Materials

Chemistry

Lab Techniques

Published: Not Published

  1. Preparation of Laboratory

    Here we show the laboratory preparation for 10 students working individually, with some excess. Please adjust quantities as needed. 

    • To set up for this lab experiment, wear the appropriate personal protective equipment, including a lab coat, chemical splash goggles, and gloves.
    • Obtain enough small plastic bottles with caps for the number of students and label them ‘NaCl’.
    • Use a top-loading balance to weigh 50 g of NaCl directly into each bottle. Place the bottles of NaCl at the student workstations.
    • Fill enough 250-mL wash bottles with deionized water for each student to have one.
    • Set out the following glassware and equipment at each student lab station:
       1    Stirring rod
       1    20-mL volumetric flask
       1    10-mL volumetric pipette
       1    Pipetter
       1    600-mL beaker
       1    50-mL graduated cylinder
       1    12-in ruler
       1    Egg
       1    Eyedropper

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Why are lab measurement techniques important?

Proper measurement techniques ensure that you accurately measure the materials that you will use in your experiments. This is essential for reproducibility.

How can you measure precise liquid volumes?

Liquid volumes should be measured with graduated or volumetric glassware, such as a volumetric flask, a graduated cylinder, or a volumetric pipette. Standard beakers a.......

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  • Sodium chloride (50 g/student)
    500 g
  • Deionized water (250 mL/student)
    2.5 L
  • Small plastic bottles with cap
    10
  • 20-mL volumetric flask
    10
  • 10-mL volumetric pipette
    10
  • 10-mL pipetter
    10
  • 50-mL beaker
    10
  • 600-mL beaker
    10
  • 50-mL graduated cylinder
    10
  • 12" ruler
    10
  • Eggs (2 eggs/student)
    20
  • Eye dropper
    10
  • 250-mL wash bottle
    10
  • Stirring rod
    10
  • Weigh boats
    10
  • Top-loading balance
    -1 Dependent on the lab size

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